Tube coupling



FIG. 1 is a right side upper perspective view in a released positionshowing our new design of the tube coupling;

FIG. 2 is a right side upper perspective view in a clamped positionshowing our new design of the tube coupling;

FIG. 3 is a left side lower perspective view in a released positionshowing our new design of the tube coupling;

FIG. 4 is a right side elevation view in a clamped position showing ournew design of the tube coupling; and,

FIG. 5 is a right side elevation view in a released position showing ournew design of the tube coupling.

CLAIM We claim the ornamental design for a tube coupling, as shown anddescribed.